Injector



(ModeL) W. H. NEWELL.

INJECTOR. No. 283,013. Patented Aug. 14,- 1883.

T: INVEN TOR:

UNITED ST TES PATENT OFFICE.

\VILLIAM H. NEWVELL, OF WILLIAMSBURG, -MASSACHUSETTS.

INJ Eci'o R.

SPECIFICATION forming part of Letters Patent No. 283,013, dated August 14, 1883, Application filed m 28,1883. (ModeL) To all whom it may concern:

Be it known that I, WILLIAM HJNEWELL, of Williamsburg, in the county of Hampshire and State of Massachusetts, have invented a new and useful Improvement in Injectors, of which the following is a specification.

The objects of this invention are, first, to

render an injector self-regulating for variations in steam and water pressures, so that inspite of such variations the injecting force shall remain constant; second, to augment this injecting force to anextent greater than nsualin inj ectors; and, third, to deliverthe water to the,

jected into the combining-tube with such force as to greatly assist the steam-jet in forcing the water into the boiler,.and to compensate for any variations in the water-column or steam jet pressure. The water, becomingheated in this process by its contact or'contiguity with the injecting steam, is delivered into the boiler at the boiling-point of temperature. In addition to this arrangement I may provide atube extending from the inj ector-tube back into the water-pipe, the end of such tube extending to the narrow jet or opening, which in this case forms the j unction between said water-pipe and the water-chamber. Water is forced through, this tube and enters the water-chamber with such force as to assist in propelling the water in the chamber through the combining-tube. This also assists in heating the water in the chamber.

In the accompanying drawings, Figure 1 is a longitudinal vertical section of an injector embodying the invention, (the modification above described being shown in dotted lines,)

andEig. 2 a transverse vertical section thereof.

A is the water-chamber, to which are connected the water-pipeB and the steam-pipe D.

E is the overflow-valve. v Extending inwardly from the pipe'D is the steam-jet nozzle F, opposite to the end of which is the month of the combining-tube G.

The steam-nozzle F is provided with ribs or projections a. H is a nozzle encircling the steam-nozzle F. This is held between the part b of the waterchamber and the ribs or projectionsa of the steam-jet nozzle, a chamber, I, being thus formed between the' nozzle H and the enlarged portion a of nozzle'F. From this chamber I a water-passage, J, extends to the injectortube C, which communicates with the boiler.

The overflow-valve E is connected wit-h this The'injectortube O is secured to the body of the apparatus by the ring K.

The operation of this apparatus is as follows: Water is admitted to the water-chamber A through the pipe B, the overflow-valt e E being open, and passes through the combining-tube G and through passageJ to the valve, the injector being always used in connection with a sufficient head of water to cause this rise inthe water column. Steam is now admitted to the nozzle F andthe valve E closed. The jet of steam forces the water which it encounters through the combining-tube and toward the boiler. A portion of the water, however, passes through the passage J to the chamber I and encircling nozzle H, and, being under pressure, is projected through such encircling nozzle into the combining-tube, its

force being added to that of the steam-jet in forcing the feed-water through such tube into the boiler. The additional power thus obtained causes the water to be injected into the If it is used, the water-inlet to the chamber A r is formed into a narrow jet at m, and the pipe M extends to this 'opening. Water from the injectortube is thus returned under pressure tothe water-chamber A, and assists in forcing .the water through the combining-tube and in heating the water in the pipe B and in the chamber.

What I claim is 1. The method of operating feed-water injectors, consisting in re-enforcing the steam-j et pressure by the force of a portion of the water'returned from the injector-tube to behind the combining-tube, substantially as set forth.

2. The method of operating feed-water injectors, consisting in returning water to the steam-j et after passing through the combiningtube and reforcing it through said tube, substantially as set forth.

3. In an injector, the combination, with the steam-jet and the combining-tube, of a waterpassage for returning the water from beyond the combining-tube to behind the steam jet,

substantially as set forth.

4. In an injector, the combination, with the steam-jet nozzle and the combining-tube, of a nozzle encircling said steam-jet nozzle and a passage leading from beyond the combiningtube to said encircling nozzle, substantially as set forth.

5. The combination, with the water-cham ber, the injector-tube, and the combining-tube uniting them, of a passage leading from said injector-tube to behind the steam-jet nozzle and awater-nozzle encircling said steam-jet nozzle, substantially as set fortln.

' 6. The combination of the steam-jet nozzle having an enlarged portion, 0, the encircling behind said encircling nozzle, substantially as set forth.

9. The combination, with the water-passage leading from the injector-tube to the chamber I, of the overflow-valve communicating with said passage, substantially as set forth.

10. In an injector, a tube extending from the injector-tube to the water-inlet, substantially as and for the purpose set forth.

11. The water-inlet provided with a jet-orifice opening into the water-chamber, in combination with a tube extending from the injector-tubeto said orifice, substantially as set forth.

This specification signed and witnessed this 8th day of May, 1883.

WVILLIAM H. NEWELL.

Witnesses:

H. W. J OHNSON, G120. L. STRONG. 

